PHP Chess classes is a package of classes that lets two people play a chess game in a Web site. Once a player makes his move, the opponent is notified by e-mail to let him know that the other player made a move and now it is his turn.

The classes implement all chess rules and moves, like "castlings", "en passant" captures, stalemates in case the opponent has no longer a legal move and his king is not under attack.

In case you do not have the files for the images of the pieces, some of the most upto date browsers like Mozilla Firefox and Opera can present the pieces as text using Unicode characters for chess pieces.